malone



April 19, 1927. 1,625,127

F. J. MALONE I MILLING MACHINE FOR DESEAMING BILLETS Filed Oct. 21. 1922 4 Sheets-Sheet 1 April 19, 1927.

1,625,127 F. J. MALONE KILLING MACHINE FOR DESEAMING BILLE'I'S Filed Oct. 21. 1922 4 Sheets-Sheet 2 April 19, 1927. 1,625,121-

F. J. MALONE MILLING MACHINE FOR DESEAMING BILLETS Filed Oct. 21, 1922 QSheetS-Sheet 5 *lllllllllllllllllll llllllllllllllll 1625127 Apfll 199 F. J. MALONE MILLING MACHINE FOR'DE5EAHING BI LLBTS il 0 21. 1922 4 Sheets-Sheet 4 K 1:12:11:lliliitljijj::1

Patented Apr. 19, 1927.

UNITED STATES PATENT rricn.

FRANK J. MALONE, OF ROCKFORD, ILLINOIS, ASSIGNOR TO THE INGERSOLL MILLING MACHINE COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

MILLING MACHINE FOR DESEAMIN G BILLETS.

Application filed October 21, 1922. Serial No. 595,957.

This invention pertains in general to milling machines, and has more particular reference to a special-purpose machine for deseaming steel billets and the like. By deseaming I mean cutting from the surface of a billet the seams, creases or any spots or portions of the metal which must be removed before working the steel. Hereto- :liore, these seams etc., have been chipped out by hand and with. the aid 01 air hammore, or they have been gouged out. with a portable hand operated tool having a power driven cutter. These methods are, however, slow laborious and costly.

The primary object of the present invention is to provide means for expediting the de-seaming operations, and to this end I have provided a special purpose milling machine by which such operations may be performed in much less time and, at a lower cost than heretofore.

Another object is to provide a machine of the character described which will be convenient and easy to operate and will be practically tool-proof, so that comparatively unskilled labor may be employed for operating the machine.

In furtherance of the foregoing, I have provided. a machine characteriezd by a reciprocable table upon which a work-piece in the torm ot a steel billet is traveled back and forth beneath a rotary milling cutter, and mechanism under the control of a single operator tor moving the work table in rapid approach feed and rapid traverse movements for preventing the cutter from being lied into the work-piece during the rapid speed oi the table, and for automatically witlulrawing the cutter from the work-piece upon reversing the table motion upon completion of the milling operation.

Italy invention also contemplates the provision oi manually operable means for feeding the cutter into the work-piece, and powor-operated means for withdrawing the cutter. It also provides simple control means whereby the hand and power-operated means for moving the cutter are automatically rendered operative and inoperativc upon changing the speed and direction oi travel of the work table, to the end that the cutter may be fed into the work only when the work-piece is traveling at the feed speed and will be automatically withdrawn from the work upon engaging the rapid reverse speed for returning the table to the starting position.

I have also aimed to provide a machine of simple construction which will be thoroughly practical and serviceable for performing the (lo-seaming operations described, and any milling operations of the character referred to hereinafter.

Other objects and attendant advantages will be appreciated by those skilled in this art as the invention becomes better under stood by reference to the following description when considered in connection with the accompanying drawings, in which- .Figure 1 a front elevation of a milling machine embodying my invention;

Fig. 2, a perspective view of a steel billet after it has been de-seamed by the present machine;

Fig. 3 is an end view or the machine;

Fig. 4 is a diagrammatic view illustrating the cutter spindle drive;

Fig. 5 is'a gear chart showing the hand and power-operated means for raising and lowering the cutter spindle saddle;

Fig. 6 is a horizontal sectional view taken substantially on the line 6-6 of Fig. 8;

Fig. 7 is a diaglian'unatic gear chart illustrating the mechanism for propelling the Work table and for raising and lowering the cutter spindle saddle and also including part of the control mechanism;

Figs. 8 and 9 are detail sections taken substantially on the lines 8-8 and 9-9, respectively, o'f'Fig. '7; and

Figs. 10, 11, 12 and 13 are groups of fragmentary diagrannnatic views illustrating different positions of the control members and the operations produced thereby.

The steel billets such as designated by 13 are of various dimensions but are generally elongated and rectangular in cross section. The seams or other spots which must be cut out of the surface of the metal generally run lengthwise of a billet and are sometimes very irregular in size and shape. In the example shown seams 14, 14 and let have been removed by a relative lengthwise feed movement between the milling cutter and billet and the spot 15 at one end has been removed by lateral feed of the cutter. The milling cutter 16 employed for these deseaming operations may be of any suitable iii;

construction; but I prefer to employ one of the inserted-tooth type in which the teeth 17 have a cone prolile as shown.

A billet to be de-seamed will be clamped or otherwise secured at a central position on a worlecarrying table 18 which is mounted to reciprocate horizontally on a suitable bed or frame designated generally by 19. 1 con ventional feed screw 21 operating in a nut on the table is employed at present for traveling' the work table back and forth on the bed.

The milling cutter 16 is carried by a horizontal. spindle 22, Fig. 6, which revolves in a quill 23 mounted. to slide axially in a saddle This saddle mounted to slide vertically on ways 25 on the upright housing; 26 at the rear side oi the bed 19, is adapted to be raised and lowered on said ways by means oi a screw 27 and nut 28, as will be explained more fully hereinafter. The cutter spindle 22 is adapted to be continuously driven while the machine is in opera tic; by an electric motor 29 through the agency of suitable reduction geirii'ig, including the spur gears 81. and the bevel gears 32, which drive a vertical shalt equipped with worm in mesh with a worm gear 35 i XQCl to a sleeve 36 in which the spindle is splined. The cutter spindle may be fed axially to move the cutter laterally with respect to the wort; by suitable means such for example as hand wheel 3'] iected by bevel gears 38 to a screw aerating the nut l1 fixed to the quill 234 rem the foregoing; it will be mani 5t that he cutter spindle suitably mounted for operation directly above the work table, is adap d to be continuously revolved and to be .l and. lowered and led laterally with .spect to the table.

In 'eg'ard to propellingthe work table, my

invention contemplates the provision of suit- 1 e HIQClltLlllSl'll for trz-iversing ta in a compuraiively rapid approach, tor bring- )osite; directions at speed known as rapid the work-piece into proximit to the cuttor, and rapid reverse tor a rning; the wort-piece to the starting position after con'ipletion of the mill'ng operation and at a slower speed known as the teed, during which the milling operation performed. At present I employ a train of gearin with L r r. erposed clutches for producing; these table u'mvements, which gearing and clutches will now be described. As shown in Fig. 7, the shaft 42 driven by a belt and pulley from an electric notor 4-3, Fig. 1, drives a shaft l i through the agency of spur gears (l5. Either of a pair oi bevel gears l-G and e7 loose on the shaft id and meshing with an intermediate o 48 fixed to a shaft 49, is adapted to be connected to the shaft 414: by a toothed clutch element 51 splined on said shatt- (Lid movable by a shifting fork 52 into and out n 11 ml of engagement with complemental clutch teeth 0 i call gears. A weighted hand lever 53 the trout oil the machine connected to j a spur ring with i ich carries 6'" refilling wiih a bevel. 1' The clutch shifted by operaii'ront oi? the ma y 60, said lever oi? treadles "ill die '79 is de- 1 element (31 h b: and when icsh d it will shii't i to en igement with able connect i ,1 adapted to ol a foot lever at the dcfl too generally b V Vippositcly disposer, to and 81. li hen the loot trea i t the clutcl clutch element (31. may be pro *7 nupose. At pres-- cnt it consi: T and 9) a. liul: 67

(",(l and an arm 68 lifted l 9 loose on the shaft 5", and suil'a )lc IHUUJH train between the 'd clutch element (ll. This Des an arm 'i'i lined to the (1. connecting said arm 7 l 2'- lever 71', and an opp.

p i i bell-crank lever 71 connecting said lever Tl" and a li er Y1 which in turn is ctmnected. lo a to. 7i which shiii ts the clutch element (ll. Plaid motion train is cons'tr uctcd as disclosed merely because of the position of the o 'ieratinc arm Tl. with respect to the clutch elei' it 6'1 and tor the purpose oi s owing a cou'iplete oi'ganimation of parts in a ear chart. The arm 65% carries a forwardly projecting lug 2'2 (.llSl lOt ctl in the path of the arm and adapted to be en .d by the latter for rocking the sleeve (59 colinter-clockwise direction viewingrpm. 1 and 9 when said shalt ,lllllllillly {)0 l3 l'OClIC'il by swinging the lever 53 in a clockwise dire-tion tor the pin'pose explained hereinafter. Change speed gearing; is providei'l between the shaft 59 and the table teed screw 21. consisting; oi? two pairs oi? T8 and. 74; ot dill'erent ratios, either (it which i: pted to be connected to the shaft 75 by meaas of a toothed clutch element 76 operated liv a change speed lever 77 iii the front of: tl e i iuchine. The shatt 75 connects to the :toed screw 21 by gearing 78. The gearing above described between the driving shaft 42 and the table teed screw 21. shown L 1 --1P'" n 1)\ 1 lv 1n the gear chart 1g. 4, may JL su tan T t d9 carries a wornr lill) mounted, at present in casings positioned at the rear and left hand end of the machine with reference to Fi 1. 7

By means ot the foregoing gearing and clutches, rapid and feed movements may be imparted. to the work table. in the idle position before starting, the control levers will. occupy the positions shown in Fig. 1. To start the machine the hand lever 77 will be shii'ted'to connect either set of gears 73 or 7 1: in thetrain of drive. Assuming that both driving motors are in operation and that the table 18 is at the right hand end oi the bed, as shown in Fig. 10, the clutch element 5]. will be engaged with the gear ll and the clutch element (St willbe in the neutral position as shown in llig. 7. The gears 4M3, 41:7, 58 and (32 will revolve in the direction indicated by the arrows, ii i", raid arrows iruilicating the direction of travel at the near side of the gears. To advance the worlopiece to the cutter in the rapid approach movement, the operatorraises the hand lever 53 to the "toll. line position 53 shown in Fig. ll), thereby engaging the clutch element 5i. with the gear ll, and the clutch element (31 with the gear (52, as shown in Fig. ll), and feeding the table low wardly at the rapid speed. It will be noted that in raising the hand lever 53 the arm :35 will contact the lug 72, more the arm (38 to the left, and move the motion train i l--Tl., above dcscrila-al, so as to shill. the clutch elen'ient (ii to the lel't when the cnitch ehanent Fl. is shiil'lcd to the right. When the worth-piece ajn'n'oaclies within close prosiniity to the cutter, the operator drops the lever 53, thereby disengaging the clutch element 51 from the gear and engaging it with the f it; so as. to reverse the rotation oil the gears in and (33 as noted in Fig. ill by the arrows, and. \vitlnlrawing the arm 35 'irom the log 72 so as to permit the l\!\tl 0 to return to its normal POHlllOll, leaving the clutch clement disengaged or in a vertical position. This discontinucs the table drive and the table will stop. Upon depressing the treadle 8i, oi the :ioot lever 30 in the manner shown in Fig. l2, only the clutch element 31 will be shill'ed to connect the slow moving worm gear 58 to the shaft .13), thereby rn'opelling the table iterwardly at the slow or 'leed speed, it being noted that the gear it always revolves in the opposite direction troni the gear (32, but that by shifting the rev rsing clutch 51, the worm gear in revolves in the same direction during the lred speed as the gear on during the rapid approach speed, conseipiently pro- )elling the table l'orwardlv. Ailiter the l milling operation has been cmnpleted, the

OPQl'lllUl. may return the worl: table to the starting PUldlldUll in a rapid rovers movement by depressing the loot treadle if), as shown in .llig. l3, thereby shitting the clutch element 61 into engagement with the gear 62, which revolving in the opposite direction "from the worm gear 58 and at faster speed, produces the rapid reverse movement. To stop the table the operator withdraws his foot from the treadle 79 and the lever will be returned. to neutral position as will be explained more fully hereinafter.

The foot lever 60 also controls the opera-- tiveness ot a hand and a power operated. means for raising and lowering the spindle saddle, as will now be explained. Reiterring more particularly to Fig. 7, it will be seen that the shatt il-.2 drives through intermediate bevel gears and sha'lting 82, a bevel gear 83 loose on a shaft 81- and adapted. to be connected thereto by a toothed clutch element 85 splined on said shaft 84:. A bevel gear 36 lixed to said shajtt 84lmeshes with a bevel gear 87 tixed to the nut 28 mentioned above, so that when the gear 81% clutched to the shalt 84 the latter will be driven by power from the shatt 4:2 for re- \*olving the screw 27 in a direction to raise the spindle saddle. When the clutch element 87 is shifted in the opposite direction, it will clutch to the shaft 8i, a gear as loose thereon and connected. by gears '39) to a hand wheel 91. at the trout o't the machine. This wheel 91 may be rotated by hand for aising and lmvering the spindle saddle and vloi' feeding the cutter into and out of the workpiece, but this operation by the hani'l wheel may he performed only while the table is being propelled at the teed speed, or when the table is idle, as will be inesently n'iorc :lully explained. Said clutch element as is adapted to be shifted by operation ot the toot lever (30 in the following manner.

til-aid toot lever has an upstanding arm 9:2 (llSPOSGll between two plungers 93 and ill supported in stationar housings. Each plunger is urged ttnvard said upstaruiling arm by a compression spring 95 and is limited in its approach to said arm by an adjustable stop nut 96. The plunger fl!- connects to a bell crank lever 97 which is coimected by a, link 92% to a yol-m 5h) tor shi t t-- ing the clutch element 85. taaid yolqe is lined to a reel: shaft 101 to which is lixei'l an arm 102 connected to a rod 102, the upper end of which carries a head 10%: Hilllljlitll to be actuated by a stop 10:") on the spindle saddle tor disconliiecting the clutch element 85 from the gear 82') as will be presently c);- plained. 3y means of the foregoing mechanisnl, the hand wheel 91 will be connerlcd to the shaft 84-. by depression of the treadle one 8i of the toot lever ($0. This renders operative the hand operable means for teeth the lever 77 has been moved to the neutral position and the foot treadle 81 depressed. In other words, as long as the treadle 81 is depressed so that the table is either propelled at the feed speed or is stationary, the cutter may be raisedand lowered by manual operation of the wheel 91. As soon as the treadle 8-1 is released. the plunger til will be forced to the left by the pressure stored in the compressed spring 95, thereby tin-owing the toot lever to a neutral position and throwing the clutch element into engagement with the power-driven gea 83. This revolves the shaft 84: in such direction as to elevate the cutter spindle saddle in a quick movement, although in actual practice. it is only necessary to elevate the cutter about one inch in order to ren'iove the cutter a sate distanceal iove the work piece.

The operation oil the machine as lollows: The operator stands directly in :lroi-it oi the machine so that with the lett hand he may operate the lever 52:3 and the hand wheel 91, and with the right hand, the hand wheel 37 and the lever 77. Being directly in trout of the machine, the operator may conveniently operate the toot lever 3'0 with out moving from the hand controls. Assuming that the billet to be mill-cl is that shown in Fig, 2, and that it is properly clamped onto the table, the latter will be advanced in the rapid a-pprozu'ch movement to bring the billet into proximity to the cutter, this being done by raising the lever 53 explained above, and then dropping it to stop the table. The operator will then depress the foot treadle 81, thereby PTOPGlllI-lg the table to the left at the slow teed movement, and at the same time rendering the means operative tor lowering the (It. -rinto the work. The operator by manipulating the hand wheels 91 and 37 and with his foot on the treadle Si, lowers the cutter and adjusts it laterally so that it enters. the billet at the point A. By feeding the cutter down to proper depth and then causing, by manipulation ot the wheel 37, the cutter to follow the contour of the seam let, the latter may becompletely milled out. It will be noted that no power-operated means is provided tor teeding the cutter into the work aside from the power teed ot' the table; and that the cutter can in no way be entered into the work until the table propelled. at the slow feed speed, thus preventing accidents which in' it be caused by jamming the cutter into tae work at more rapid speed than the capacity of the cutting; tool will allow. Upon finishing this milling operation, the operator simply releases the loot treadle 8t, w'herei'tpon the spindle dle will be lmmediately elevated by the power-operated means above described, until stopped by thestop member 105. l pon releasing the treadle- 81 the feed of the table will likewise be stopped. By depressing the foot treadle 79, the table will be re turned at the rapid speed to the starting position, and upon releasing said treadle the spring-pressed plunger 93 will return it to neutral position, thereby stopping the table. This rapid reverse movement may obviously be stopped at any point, and in the present example the table would be stopped belore reaching the starting position, or in other words, just after the seam ll has passed the center 01'? the cutter. The operator will then proceed through the cycle oli operations just described by putting the table into the power feed and bringing the cutter into operation. on the seam 14; by hand teed. Since the power teed of the table is stopped by releasing the treadle 81,. the cutter will be automatically elevated. The nex seam may be milled out in a similar manner, this seam requiring a lateral feed of the cutter by operation of the wheel il? in order to "follow the contour of the seam. The spot l5 extends crosswise of the billet at one end: thereof, and this milling operation may be accomplished by teeding the table to a position with the spot 1.5

directly beneath the cutter, then stopping the table 'l ceiil 1y throwing the lever 77 into i'ieutrah, then while holding the treadle 81 Mid, lowering the cutter into the worlupioce by operation of the hand wheel 91 and feeding the cutter laterally by operation 01 the wheel 37.

From the foregoing illustrations ol? practical ope. aliens, it will be maniiest that the present machine is capable ol milling out any scams, creases or other blemishes which it is desired to remove bctore working the billets. lit will also be evident that the machine is under such cemtrol oi the operator that he may with comparative ease, guide the cutter tor milling outthe various seams and. spots. l urtherinore, the control so designed that it. is practically inxipossible tor the operator to injure the machine it reasonable care is employed in feeding the tool into the work.

ii'hilc in the 'toregoii'ig, have illustrated and described a mechanically operated. means tor in'iparting the several movements, should be understood that my inventioi-i contemplates broadly the provision o'l any suitable means, whether met-rha-nioally, electrically or hydraulically operated for oi-ieruting and cmitrolling the cutter and work table for the purpose of (lo-seaming billets, or for pertorming any n'iilling operationin which similar movements are required. It should be understood, therefore, that the present dis closure is for the purpose of illustratit-m merely, and that considerable change might be made in the provision ot mechanism for the purposes intended herein without departing from the spirit and scope of the in vcntion as expressed in the a p pended clain'is:

l claim:

l. in a machinc "for (l(*i%\,lil'llllll billets and the like, the combinatiim with a i'cci 'n'ocablc w ,rk tal'ilc, and a millingcutter. oi n'iccha nisni 'l'or propelling: the work ialilc at rapid ai'iproach and reverse speeds and feed speedsw means tor 'l QWllTlQ' thc cuttcr inlo ilic work, filial uicaus tor rcndcrin l n'icntionciil means inoperative at a l limes except when the Feed spccd of: said table propelling ll1fit'll auisin is cngra crcd.

52-. In a machine For tic-seaming billets and the like, the coinbination with a rcciproca blc work table, and a milling cutter, oi machanisni tor propcllinp the worl; table at rapid and tccd spccds, manually operable means ior tccding the cutter into the work, and in *ans tor rcndcring said manually opcrablc means inoperative at all times except 'whcn said l'ced speed of the table-propelling; means is engaged.

3. in a machine tor (lo-scanning; billets and the like. the combination at a reciprocaoic work table, and a milling cutter, oi mechanism tor feeding the work table past the cutlcr. means itor tccding the cutter into the work, and control mcchanism 'l'or p rcvcnting operation of said cuttcr-tceding mechanism while the work table is being propelled at 1 rapid traverse speed but permitting its operation during a feed speed.

i. A n'iachinc ot the character described, comprising a horizontally rcciprocablc work table, a vertically and laterally movable work-cutter, power-operated mechanism for transmitting feed and rapid traverse movements to the table and tor elevating the cutter, and control means for said mechanism including means whereby the cutter can not be fed into the workpiece while the table being propelled at said rapid speed.

5. A machine of the character described, comprising a horizontally rsciprocablc wor table, a vertically and laterally movable work-cutter, power-operated mechanism for transmit-ting :tccd and rapid traverse movements to the table and for elevating the cutter, manually operable mechanism for feeding the cutter downwardly, control means for said power and manually opcrable mechanisms, including a control member for causing the table to advance rapidly to the cutter during which said cuttcr-opcrating mechanism is inoperative, and a con.

trol member for transmitting; teed movement lo the table and for rendering said manually operable mechanism operative tlor feeding: the cutter into the work. i

6. A machine of the character described, compris ng a horizontally reciprocabls work table, a vertically and laterally movable woij'lt-cuttcr, poweuopcratcd mechanism for transmitting feed and rapid traverse movcments to the table and for elevating the cut tar, niianually operable mechanism :i'or teedin i the cutter downwardly, control means for said power and manually operable mech anisms, including a control member for causing the table to advance rapidly to the an: durii which jl cutter-operating mechanism is in oin-rstive, and a control incmbcr lor lrai'isu'iitt'np; teed moven'ient to the table and for rendering said manually operable mechanism opcrativc for feeding thccutter into the work, the last mentioned control member being also operable for rcvcrsing the travel (it the table and for auton'iatically rcnrflering said powcr-operatcd mechanism operative tor elevating the cuttcrin a machine of the character described, the combination with a rcciprocable work tahlc and a milling cutter, oi mechanism for propelling the table at rapid traverse and feed speeds, mechanism for .u'ioving the cutter into the work by hand and for retractthe cutter, and control means for preventing the cutter from being ted into the work until the feed speed of the table engaged, and for automatically causing the cutter to be retracted by power when the travel of the table is reversed.

8. A machine of the character described coniprising a horizontally rcciproca'ble work table, a milling cutter disposed above aid tabla, )owcr-opcrated mechanism for propolling the table in rapid approach, t'ccd and rapid reverse movements, hand-operated mechanism tor lowering the cutter and powcr-opcratcd mechanism for raising the cutter rendered operative and inoperative by operation of said table-propelling mechanism.

9. A machine of the character described comprising a horizontally rcciprocablc work table, a milling cutter disposed above said table, power-operated mechanism for propelling the table in rapid approach, feed and rapid reverse movements, handcpcratcd mechanism for lowering the cutter and powcr-opcratcd mechanism tor raising the cut tor, and control means tor said mechanisms including a single control member operable for producing said teed speed of the table and for rendering. said hand and power-operated mechanisms operative and inoperative.

10. A machine of the character described comprising a horizontally rcciprccablc work table, a milling cutter disposed above said table, poweroperated mechanism for pro polling the table in rapid approach, feed and rapid reverse n'iovci'nents, hand-operated. mechanism for lowering the cutter and powr-opcratcd mechanism for raising thccuttor, and control means :tor said mcchanisn'i includi c: a single control member operable for producing said feed speed of the table l L Li and for rendering said manually operable means operative for lmvering the cutter when said feed speed is engaged and for rendering said power-opei'ated means operative tor raising said cutter when said feed speed is stopped.

11, In machine for tie-seaming billets and the lilre, the combination with a, hori- Zontally .ij'eciprocable work table, an overhead milling cutter, mechanism for reciproeating,- said table and for raising and lowering the cutter, and control means for said mechanisms at the front ot' the machine, comprising a tool; lever having: treadles at opposite ends, one of which is adapted to be depressed for causing the table to be moved forward at a feed speed and the other of which is adapted to be depressed for pro polling the table in the reverse direction, a manually operable wheel adapted to be revolved for feeding the cutter dmvnwardly, and means whereby said manually operable wheel is operative only when said foot treadle is deprefaied tor the teed speed.

12. A milling machine for dc-seaming billets comprising in combination with a reciprocable table and an overhead cutter, of mechanism for propelling the table at rapid traverse and feed speeds, mechanism for feeding the cutter into the work and for retracting the cutter, and means whereby the cutter-iteedingg,- mechanism is rendered inoperative except when the table-propelling mechanism is in condition for effecting said feed speed.

13. A machine for (lo-seaming billets comprising a milling cutter, a billet-carrier, manually operated means for feeding the cutter into the billet, power-operated means for retracting the cutter, power-operated means for feeding the billet-carrier past the cutter, and control mechanism for rendering the manuallyoperated means inoperative except when the carrier feed is engaged.

14. A machine for de-seaniiing billets comprisin a milling cutter, a billet-carrier, mama ly operated means for feeding the outter into the billet, power-operated means for retracting the cutter, power operated means for feeding the billet-carrier past the cutter; and control mechanism for preventing operation of said manually operated. means un-- til the carrier feed has been engaged and for automatically causing said power-operated means to retract the cutter when said carrier feed has been terminated.

15. A milling machine of the character described comprising a horizontally reciproczible work table, an overhead cutter, mechanism for propelling the table in forward and reverse directions controlled by a foot lcver at the front ol the machine, mechanism for feeding the cutter downwardly controlled by a hand wheel at the front of the machine, and a hand wheel "tor feeding said cutter laterally with respect to the work table.

16. A milling machine of the cl'uiracter described con'iprising a horizontally reciprocable work table, an overhead cutter, mechanism 't'or propelling the table at rapid traverse and feed speeds in one direction and rapid traverse speed in the rev rse direction, control. means at the front of the machine for said mechanism, mechanism for feeding the table downwardly, and control means for preventing down teed ot the cutter except when the table feed is engaged.

17. A milling machine of the character described, a bed, a work able horizontally reciprocable on the bed, an upright housing at the rear of the bed, a spindle saddle vertically movable on said housing, a horizon tal cutter spindle in said saddle on an axis transverse to the work table and adjustable axially, power-operated mechanism tor propelling the work table at rapid traverse and feed speeds. manually operated mechanism for vertically feeding and power-operated mechanism for elevating said spindle saddle, manually operated mechanism for axially adjusting said spindle, and means whereby a single operator at the front oi the machine may control the operation of said cut ter and table-operating mechanisms.

FRANK J. MALON E. 

